'Superstructure' definitions:

Definition of 'superstructure'

(from WordNet)
noun
Structure consisting of the part of a ship above the main deck

Definition of 'Superstructure'

From: GCIDE
  • Superstructure \Su`per*struc"ture\, n. [Cf. F. superstructure.]
  • 1. Any material structure or edifice built on something else; that which is raised on a foundation or basis; esp. (Arch.), all that part of a building above the basement. Also used figuratively. [1913 Webster]
  • You have added to your natural endowments the superstructure of study. --Dryden. [1913 Webster]
  • 2. (Railway Engin.) The sleepers, and fastenings, in distinction from the roadbed. [1913 Webster]